Power transmission



R. LiNDBLOOM.

POWER TRANSMISSION.

' APPLICATION FILED AUG-7,1918.

1,340,833, Patented May 18,1920.

UNITED STATES PATENT OFFICE.

' RALPH LINDBLOOM, OF ST. PAUL, MINNESOTA.

POWER TRANSMISSION.

Specification of letters Patent. t t May 13,. 192

Application filed August 7, 1918. Serial No. 248,752.

To all whom it may concern.-

Be it known that I, RALPH LINDBLooM, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented a new and useful Improvement in Power Transmissions, of which the following is a specification.

This invention relates to the transmission of power in connection with self propelled Vehicles for actuating a hoist for tilting and unloading the contents of a body by the same power unit which is employed for propelling the vehicle. More particularly this invention relates to the particular manner and construction employed for operating the hoist by the main drive shaft which is revolved by the power unit. The primary object of the invention is to provide simple and inexpensive construction for accomplishing the results stated, and to these ends K my invention comprises the features ofconstruction and combination of parts herein- I after particularly describedand claimed.

In the accompanying drawing forming part of this specification, Figure 1 is a typical side elevation of an automobile truck portions of the structure being broken away and in section. for the purpose of more clearly illustrating the invention; Fig. 2 is a longitudinal section of a detail, showing the clutch mechanism, and Fig. 3 is a cross section taken on the line X-X of Fig. 2.

In the drawing let A indicate a body frame of an automobile truck, B the usual power unit, C a detail of the usual body which is arranged to tilt upwardly and rearwardly to dump the contents thereof. Arranged on the body is an upwardly extending hydraulic hoist D containing the usual ram 2 and having a liquid circulating propelling pump 3 connected by suitable ducts,

so that when the pump is operated it is adapted to propel the fluid medium in the hoist and force the ram upwardly to effect the tilting of the body in the usual manner. Carried by the upper end of the ram 2 are the usual sheave pulleys 4 over which the hoisting cable 5 travels, the ends of said cable being attached to the depending arms 6 secured to thebody and the intermediate portion of the cable passing around a sta tionary compensating sheave 7 journaled on v the cylinder 8 of the hoist. The pump 3 is of ordinary gear type and has a main drive shaft 9 upon which is mounted a sprocket wheel 10, over which a chain belt 11 travels sections 12 and 13, the-forward section 12 extending rearwardly and being driven either in forward or reverse directions through the operation of the usualplanetary change speed and reverse mechanism E, which is controlled by the operation of the foot pedal 14 in the usual manner. The rearward end of the forward section 12 of the drive shaft and the forward end of section 13 meet approximately and are freely joined in alinement by the bearing sleeve 15, which is splined to section 12 by .the feather or key 16 and revolublyunited with the adjacent end of the shaft section 13, so that said sections may revolve independently of each other. The rearward end of the shaft section 13 is connected by the gearing 1; with the rear'jack shaft 18 to drive the latter in the usual manner, a suitable gear housing 19 of usual construction being employed to which the rearward end of a sleeve 20 around the section 13 of the shaft is secured by bolts 21 or other suitable means. Arranged over the adjacent ends of the shaft sections 12 and 13 is a yoke 22, which serves to assist in supporting said sections and the transmission parts to be hereinafter described. The forward end of the sleeve 20 is seated in the rearward end of said yoke and the forward end of the section 13 is journaled in the bearing sleeve 15 formed by the'yoke. The forward shaft section 12 is surrounded by a sleeve 24 seated in the housing 25 of the ,main transmission E and in the forward. end of the yoke 22. By this construction, the shaft sections are caused to revolve in alinement and are substantially supported for operation either ining longitudinally therethrough, which are adapted on one side of th clutch to receive the teeth 29 of the driven clutch member 30 in one extreme position of the member 26 and on the other side to receive the teeth 31 of the driven clutch member 32 in the opposite extreme position of member 26.

When the member 26 is in neutral position,

it is entirely out of engagement with the teeth 29 and 31 and neither of said members 30 and 32- is driven. member 30 is rigidly secured to the driven section 13 of the shaft by the key 33 and the driven member 32 is revolubly mounted free of the coupling 15 in the collar 34, Which-is carried by the yoke on the inwardly projecting arms 35. The collar 34 is arranged concentrically about the axis. of the shaft, so

transmitted to the pump shaft 9 to operate said pump. J ournaled in the channel 37 concentrically about the axis of the shaft is a collar 38, said collar being formed with trunnions 39, which are journaled in trunnion Farms 40 and 41. These arms are secured to the pin 42 which is journaled through the yoke, slots 43 being provided so that by swinging the trunnion arms the clutch driving member 26 is shifted forwardly or backwardly on the coupling 15 into and out of clutch engaging positions. One of the trunnion arms 40 depends below one of the trunnions, and its 'lowermost end is coupled by a connecting rod 44 with a shifting handle 45, which is pivoted between its ends at 46 on the frame A of the truck.

In operation when the lever is in median position, the clutch driving member 26 stands out of engagement between the clutch driven members 29 and 32. When it is desired to operate the truck to propel the same, the upper end of the lever 45 is tilted forwardly, causing the clutch driving member 26 to engage and drive the clutch driven member 30 and transmit power from the driving member of the shaft to the driven member. When it is'desired to operate the hoist and tilt the body G into dumping position, the lever 45 is reversed to extreme position causing the clutch driving member 26 to disengage the driven member 30 and after passing median position to engage the clutch driven member 32, causing power to be transmitted from the driving member of the shaft to the pump shaft 9 and propel the fiuid medium contained in the hoisting cylinder upwardly against the ram to raise the latter. The reversal of the pump to lower the ram is accomplished by the reversal of the driving member 12 of the main driving shaft through the operation of the reversing mechanism E and the manipulation of its foot lever 14 in the usual manner.

The transmission mechanism for operating the pump or other external device to be driven by the main drive shaft of the vehicle The driven clutch The driven member 32 has is very simple and effective in operation and provides an effective device for accomplishing the results attained.

- In accordance with the patent statutes, I have described the principles of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof, but I desire to have it understood that the construction shown is only illustrative, and that the invention can be carried out by other means and applied to uses other than those above set forth within the scope of the following claims.

Having described my invention, what I claim as new and desire to protect by Letters Patent is: r

1. Power transmitting mechanism, comprising, in combination, a drive shaft having driving and driven sections in longitudinal alinement, and having abutting ends,

a coupling sleeve secured'to one of said sections and revolubly connected with the other, a yoke supported over said coupling 2 sleeve, a driving clutch element shiftably mounted upon said coupling sleeve and Se.

cured thereto to be revolved, a driven clutch element revolubly mounted upon said yoke free of said coupling sleeve and adapted to be engaged and driven by said driving clutch element, another driven clutch element carried by said drivensection of said abutting, a pump mounted upon said vehicle to be driven by said shaft, a clutch interposed between said abutting sections of said 7 shaft having a driving element coupled to said driving section and a pair of driven elements with either of which said driving clutch element is movable into driving connection, one of said driven clutch elements being connected with the driven section of said shaft and the other having a driving connection with said pump to-operate the latter and means for shifting said driving clutch element into and out of clutch engaging positions. 1 J

.3. Power transmission mechanism, comprising, in combination with a self propelled vehicle having a maindriving shaft reversibly driven and provided with driving and driven sections in longitudinal alinement, and having their ends abutting, a yoke over the abutting ends of said shaft sections, a coupling sleeve united to one of said shaft sections and revolubly connected with the tion having power transmitting mechanism other, a driving clutch element slidably connected thereto to be operated thereby and mountedupon said coupling sleeve, a driven means hung from said yoke and operable by clutch element united to the driven section the driver for shifting said driving clutch 5 of said shaft and with which said driving element into and out of clutch engaging po- 15 clutch element is adapted to connect, another sitions. driven clutch section with which said driv- In testimony whereof I have signed my ,ing clutch element is adapted to connect name to this specification.

journaled in said yoke free of said coupling 10 sleeve, said last mentioned driven clutch sec- BALPH LINDBLOOM. 

